本文關(guān)鍵詞：線性剪切來流對方柱繞流特性影響的數(shù)值分析　出處：《水利水電科技進展》2017年01期 　論文類型：期刊論文

  更多相關(guān)文章： 線性剪切來流 方柱繞流 特征線算子分裂有限元法 剪切參數(shù) 流場結(jié)構(gòu)

【摘要】：為研究線性剪切來流對方柱繞流特性的影響,將對流出口邊界條件引入特征線算子分裂有限元法中,建立了線性剪切來流的方柱繞流數(shù)值模型,并采用均勻來流的方柱繞流模擬結(jié)果驗證了該模型計算方柱繞流問題的可靠性。數(shù)值模擬結(jié)果表明,剪切參數(shù)k對方柱繞流尾部形成的兩排渦影響明顯,渦脫落在k較大時被抑制,在k≥0.4時渦量最終形成一個類似三角形的區(qū)域;駐點隨k的增加逐漸向高速側(cè)分離點移動,在k≥0.3時駐點的位置不再發(fā)生變化;平均阻力系數(shù)在0.2≤k≤0.25時發(fā)生較大變化,平均升力系數(shù)在k≥0.2時為負。
[Abstract]:In order to study the effect of linear shear flow on the flow around a cylinder, the convection exit boundary condition is introduced into the characteristic line operator splitting finite element method, and a numerical model of linear shear flow around a square cylinder is established. The simulation results of uniform flow around a square cylinder verify the reliability of the model in calculating the flow around a square cylinder. The numerical simulation results show that two rows of vortices formed at the tail of the shear parameter k are obviously affected by the flow around the cylinder. The vortex shedding is suppressed when k is larger, and when k 鈮，

本文編號：1385780